Fragility-Based Improvement of System Seismic Performance for Long-Span Suspension Bridges

Table 3

Limit state thresholds for pot bearings (m).

	DS1	DS2	DS3	DS4
Criteria	Allowable slipping displacements	Spherical skateboard radius, body separation of bearings	Possible pounding between adjacent decks or deck and pylon	Possible unseating
MBD/L	0.25	0.31	0.76	1.555
MBD/T	0.02	0.31	0.45	—
Criteria	Allowable slipping displacements	Possible pounding, entering of abutments nonlinearity or shear key degradation	Spherical skateboard radius, body separation of bearings	Possible unseating
ABD@C/L	0.02	0.095	0.28	0.775
ABD@C/T	0.02	0.1622	0.28	0.57
ABD@A/L	0.05	0.095	0.20	0.775
ABD@A/T	0.02	0.1622	0.20	0.87